Income Taxes Income Taxes (Details)	3 Months Ended
	Mar. 31, 2013
Minimum | US Federal
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2009
Minimum | State of Oregon
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2008
Minimum | State of Massachusetts
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2008
Minimum | State of California
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2007
Minimum | Sweden
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2007
Minimum | United Kingdom
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2006
Minimum | Belgium
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | US Federal
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | State of Oregon
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | State of Massachusetts
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | State of California
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | Sweden
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | United Kingdom
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011
Maximum | Belgium
Income Tax Examination [Line Items]
Tax years open to examination by major taxing jurisdictions	2011